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US 7,804,761 B2Granted
Multiplexing separately modulated channels
AssigneeCeragon Networks Ltd.
InventorsIsaac Rosenhouse, Haggai Mizrahi
Life of this patent
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Abstract
A method of data transmission which includes providing a plurality of data streams, having different content, modulating the different data streams by respective modulators, multiplexing the modulated data streams into a single data stream alternately in time, such that the resultant stream includes at any specific time signals from fewer than all the data streams and transmitting the multiplexed single data stream onto a transmission channel.
Claims31
A method of multiplexing and transmitting data, comprising:
- providing a multiplexer with a plurality of data streams, having different content;
- modulating the different data streams by respective modulators;
- multiplexing the modulated data streams into a single data stream alternately in time, such that:
- the resultant stream includes at any specific time signals from fewer than all the data streams;
- and
- switches between two data streams in the multiplexed single data stream occur when respective filters of multiplexers of the two data streams have a substantially same state;
- and
- transmitting the multiplexed single data stream onto a transmission channel.
5 more elements
A modulator system, comprising:
- a plurality of modulators;
- a plurality of respective selectors for each of the modulators, adapted to alternately provide the modulators with a block from an input stream or a predetermined separation sequence;
- and
- a multiplexer adapted to combine modulated data streams from the modulators into a single data stream which includes at any specific time only signals from one of the modulators, such that switches between two modulated data streams occur when respective filters of multiplexers of the two modulated data streams have a substantially same state.
1 more element
A method of data modulation and transmission, comprising:
- modulating a plurality of data streams, having different content, independently of each other;
- switching between data streams when respective filters of multiplexers of the data streams have a substantially same state;
- and
- upconverting the modulated data streams into a frequency band without frequency gaps within the band;
- and
- transmitting the upconverted modulated data stream on a transmission medium.
3 more elements
Dependencies are inferred from the claim text.